Jay Biggerstaff-USA TODAY Sports

With its rookie corner in a new role, Kansas City’s defense has turned a corner.

Ever since Steve Spagnuolo became the Kansas City Chiefs’ defensive coordinator in 2019, his unit’s slot cornerback has been a critical part of his scheme.

Halfway through Spagnuolo’s first season, safety Tyrann Mathieu took over the role. Playing there unlocked Mathieu’s ball skills and football IQ — and he became one of the catalysts for the defense’s...

Continue Reading Film Review: Trent McDuffie in the slot unlocks Steve Spagnuolo’s playbook